Device for spraying or projecting powdery, fragmentary or liquid material

Abstract

A device (1) for spraying or projecting powdered, flaked, or fragmentary material, or even liquid material, which can be airborne, the device comprising from upstream to downstream: - a pulsed air unit (2) supplying compressed air, - a chamber (3) housing a reservoir (30) intended to hold material to be sprayed, - a downstream projection chimney (4) communicating with the reservoir (30), - the device comprising a compressed air flow circuit (31), the circuit (31) communicating with the pulsed air unit (2) and being arranged and enclosed within the chamber (3) while being outside the reservoir (30) and extending along the length of the reservoir and all around it, while the reservoir (30) includes through passages (300) which open into the air flow circuit (31).

Description

[0001] The invention relates to a spraying or projection device for powdered or flaked material or other fragmentary material, or even liquid, which can be airborne.

[0002] The invention will be described more particularly with regard to a spraying device for powdered products such as insecticides, especially for the destruction of wasp or hornet nests, but not limited to this. Another application is, for example, the projection of confetti. In general, the invention applies to all particles or fragmentary bodies capable of being carried by the air.

[0003] In the application of insecticide spraying for hornets and others, a known device includes an insecticide powder cartridge, a spray nozzle connecting downstream of the cartridge, a pole with a conduit connecting upstream of the cartridge, and a gun with a compressed air cartridge to deliver compressed air through the conduit from the pole to the cartridge.

[0004] However, such a system requires a constant supply of compressed air cartridges. Furthermore, it is desirable to be able to precisely control the amount of insecticide used to minimize the environmental impact of such products, which is not always possible.

[0005] A hornet nest treatment device using calibrated cartridges or doses, as defined by patent EP3982722, is known. The device dispenses the required amount of insecticide. For the device to function, the appropriate dosing cartridge is inserted, which automatically pierces it both upstream and downstream. Compressed air is supplied by a cylindrical air pump connected to the device via hoses. The compressed air delivery is controlled by the opening and closing of a remotely operated smart valve.

[0006] However, even though each cartridge can be calibrated, the aforementioned device requires a compressed air pump, or even a compressor, which is bulky and not practical in the field.

[0007] Patent EP2987404 also describes a device for projecting a powdered chemical agent that is sprayed using a pressurized gas obtained by reacting a gas-generating agent with a liquid. Specifically, the pressurized gas is carbon dioxide obtained from sodium bicarbonate and citric acid mixed with water. However, this device is complex in design and requires a watertight container filled with water, which is quite inconvenient.

[0008] Furthermore, independently of the system allowing the projection of a powdered or liquid material, patent EP1425235 describes a spray lance for projecting at a distance and whose free end is equipped with an accessory that can be changed according to the nature of the use.

[0009] The invention therefore aims to provide a spraying device, particularly for insecticides, which does not have the aforementioned disadvantages and which, generally speaking, regardless of the material being projected, can be compact, simple to implement, efficient in its propulsion and able to adapt to the required quantity of material.

[0010] In the following description, the terms "upstream" and "downstream" refer to elements of the device located upstream or downstream with respect to the body of the device, considering the direction of spraying of the material from upstream to downstream.

[0011] According to the invention, the spraying or projection device for powdered material (powdered product, in particular insecticide) or flakes or fragmentary material, or even for liquid product, which can be airborne, conforms to claim 1. In particular, the device comprises, from upstream to downstream: means for supplying compressed gas (air), a reservoir intended to hold (temporarily store) material to be sprayed, a downstream projection chimney communicating with the reservoir, the reservoir being housed in a chamber arranged between the means for supplying compressed gas (air) and the chimney, and the means for supplying compressed gas comprising a block supplying the compressed gas and a compressed gas (air) flow circuit, the circuit communicating with the block and being arranged and enclosed within the chamber while being outside the reservoir and extending along the length of the reservoir and all around it, while the reservoir includes through passages that open into the air flow circuit, characterized in that The compressed gas is ambient air, and the compressed air supply unit is a forced-air unit that includes an air intake and blower system comprising at least one ambient outside air inlet and one air discharge outlet communicating with the chamber. An air intake and blower system is understood to mean a system comprising, in particular, a motor and a turbine.

[0012] Advantageously, the device is a linear unit that integrates the compressed air supply. Advantageously, the device does not require external compressed air supply hoses to be connected. Advantageously, the device functions as a single unit. Advantageously, the device does not necessarily need to be opened to load material into the tank.

[0013] According to one characteristic, the forced air unit includes an air intake and blowing system and includes at least one air inlet (of ambient outside air) and one air discharge outlet (which is arranged at a downstream end of the unit) which communicates with the chamber.

[0014] According to one characteristic, the chamber has an external wall. According to another characteristic, the chamber is open at both its upstream and downstream ends; in particular, it is open along its entire hollow cylindrical cross-section.

[0015] According to one characteristic, the tank is cylindrical in shape. According to another characteristic, the tank comprises a closed bottom (the bottom corresponding to the upstream end of the tank), an inner wall located at a distance from the outer wall of the chamber, and a downstream end communicating with the chimney (the downstream end corresponding to the entire hollow cylindrical internal section of the tank). According to another characteristic, the airflow circuit comprises at least one airflow channel, preferably several airflow channels distributed around the tank, each channel having an upstream distal end communicating with the forced air unit and a longitudinal portion into which the through passages open.

[0016] Advantageously, the air extraction and blowing system can be controlled remotely (via a remote control that communicates remotely with the electronic circuit of the air extraction and blowing system). The air extraction and blowing system can also be controlled by at least one button located directly on the device.

[0017] The spraying device of the invention advantageously has a generally cylindrical body, and once the reservoir is filled with an appropriate dose of material, the device is immediately ready for operation, having, if necessary, been previously attached to a pole and / or having accessorized the nozzle, for example, by adding a spike for use in combating wasp or hornet nests. The pole, which is preferably removable, can be attached to the free end of the pulsed air unit, opposite the air discharge outlet (the pulsed air unit then communicates directly with the chamber containing the material).Alternatively, the pole, which is removable and necessarily hollow with two open or perforated distal ends upstream and downstream (depending on the section of the longitudinal body of the pole), is fixed in a removable manner between the pulsed air block and the chamber, the two open or perforated distal ends upstream and downstream communicating respectively with the pulsed air block and the chamber; in this configuration the air from the pulsed air block first travels through the pole before entering the chamber.

[0018] Thus, unlike the prior art, this device uses compressed air from a forced air supply, rather than compressed air from a specific compressed air distribution device such as an air pump or compressor. The air required for the operation of the device of the invention is directly ambient air drawn in by the device's suction system. The device is therefore compact and does not need to be connected to hoses or an additional compressed air distribution system. It is easy to handle, particularly due to its general cylindrical shape. This portable device is easy to transport, especially to hard-to-reach areas.Furthermore, it is possible to stop spraying at any time by immediately shutting off the pulsed system without completely emptying the tank, which is virtually impossible to achieve with a prior art device that uses a remote compressed air system, as this system empties the tank extremely quickly. Consequently, the user of the device of the invention can resume spraying immediately after the first use since the tank will not have been emptied. Moreover, the tank does not need to be changed like a cartridge; it remains permanently installed and simply needs to be filled with the precise amount of material required. In addition, the compressed air obtained by the blower system of the pulsed air system remains under compression thanks to the design of the air circuit or flow path.Finally, the inventors demonstrated that, surprisingly, the chamber design, with a peripheral air supply circuit around the reservoir and part of which opens through passages in the cylindrical wall of the reservoir (rather than an air intake from the bottom of the reservoir as in the prior art), produces an erosion effect for powdered or granular particles and a projection of the material outside the chimney, more as a mist of particles than as a unidirectional jet. This has the particular advantage of diffusing the insecticide much more rapidly within a hornet's nest. The combination of the pulsed block, the airflow circuit, and the passages through the reservoir provides a powerful ejection device and allows for precise metering of the material, which is crucial for insecticides whose dosage must always be optimized.

[0019] Remote control allows for safe and efficient application of the product without direct manual intervention on the nest, thus increasing operator safety.

[0020] According to one characteristic, the tank comprises a closed bottom, an internal wall which is at a distance from the external wall of the chamber (the airflow circuit being between the external wall and the internal wall) and a downstream end communicating with the chimney, and the airflow circuit comprises a plurality of longitudinal airflow channels formed in the thickness of the internal wall and according to the length of the tank, the longitudinal channels comprising a part communicating with an air discharge outlet of the forced air block and a part comprising the through passages, the two parts of the channel being partitioned except at one end which is opposite the air discharge outlet.

[0021] According to one characteristic, through passages are spaced slots that are arranged around the perimeter of the tank and are staggered according to the length of the tank.

[0022] According to one characteristic, each airflow channel draws an inverted U-shaped longitudinal channel, with a first wing which starts from the upstream end of the chamber in communication with the air expulsion outlet, which has a closed wall with the wall of the tank (this first wing has no through passages with the tank) and which extends along the length of the tank (therefore along a corridor) to the end of the curvature of the U (whose wall is closed), a second wing (second corridor) which is in continuity with the curvature of the U and is parallel to the first wing, and which (the wall of the second wing which corresponds to the internal wall of the tank) includes the through passages and which extends along the tank ending at the upstream end of the chamber in a closed manner.The air propelled by the pulsed system, which is already partially compressed, first travels along the first closed-walled wing with the reservoir, whose narrower cross-section than the expulsion outlet further increases the air speed and compresses it. Then, upon reaching the second wing, it passes successively through each tiered slot from downstream to upstream, propelling the material progressively from the top (downstream part) of the reservoir to the bottom, ending with the lowest slot of the reservoir.

[0023] Preferably, the slots that are arranged near the bottom of the tank, at least for the slots of the stage closest to the bottom, have a larger cross-section than the cross-section of the other slots.

[0024] According to one characteristic, the forced air unit includes an air intake and blowing system which includes a motor, a turbine and electronic means for remote piloting and control.

[0025] According to one characteristic, the forced air unit, in particular the air intake and blowing system, has at least one air inlet which is coupled to an air filter.

[0026] According to one characteristic, the chimney is convergent downstream, like a nozzle.

[0027] Depending on the model, the forced air unit, the chamber, and the chimney are removable, and preferably the reservoir is detachable from the chamber. All components can therefore be easily cleaned.

[0028] According to one characteristic, the chimney has a downstream end (from which the material is propelled) which includes removable fixing means, in particular by screwing or magnetizing, for the fixing of an accessory chosen from among accessories which are a function of the use of the device, such as rigid or flexible prods for the treatment of hornet or wasp nests.

[0029] According to one feature, the chimney has a downstream end (from which the material is propelled) that includes removable fastening means, such as screw or magnetic attachments, for securing the spraying device to a material loading device for loading into the tank. The material is introduced into the tank by gravity flow through the chimney. Thus, particularly for insecticides, the operator does not have to handle the insecticide, which passes directly from the loading device into the tank without any contact.

[0030] The invention also relates to an assembly comprising a spraying device of the aforementioned invention, and a material loading device, the loading device comprising a storage tank and semi-automated means for delivering the material in a controlled quantity.

[0031] According to one characteristic, the loading device includes a delivery outlet which is able to cooperate by removable attachment with the so-called downstream free end of the chimney, preferably by magnetization, and which is able to deliver the material by gravity and in particular by a vibratory effect, the delivery outlet including an automated opening and closing valve.

[0032] The present invention is now described by means of purely illustrative and in no way limiting examples of the scope of the invention, and from the accompanying illustrations, in which: [ Fig. 1 [ ] represents a perspective view of an example embodiment of the spraying device according to the invention. Fig. 2 ] represents a schematic cross-sectional view of the device of the figure 1 . [ Fig. 3 ] is an exploded perspective view of the chamber including an outer shell and the reservoir with its peripheral airflow circuit. Fig. 4 ] corresponds to a perspective and top view of the downstream end of the device chamber (casing and reservoir of the figure 3 assembled). Fig. 5 ] is the opposite view of the figure 4 , corresponding to the upstream end of the chamber. Fig. 6 [ ] is a perspective view of a device for loading the material to be propelled and the spraying device installed to load the tank. Fig. 7 ] is an example of the implementation of the device of the figure 1 which is removable (between the chamber and the forced air unit) and is mounted with a pole (between the chamber and the forced air unit).

[0033] The spraying or projection device 1 of the invention illustrated in the figures 1 And 2, is intended to pulverize a powdery or flaked material or a fragmentary type that can be airborne, or even a liquid.

[0034] Device 1 can be used, in particular, to spray powdered insecticide. However, its uses are very diverse.

[0035] Device 1 has a generally cylindrical body, preferably terminating at both opposite ends in frustoconical shapes. Device 1 is composed of several parts, preferably all of which are removable and detachable from one another. In particular, Device 1 comprises, from upstream to downstream, a forced air unit 2, an intermediate chamber 3, and a projection chimney 4. Chamber 3 includes within it a reservoir 30 and an airflow circuit 31 that is peripheral to the reservoir 30. Chamber 3 has an upstream end 3A and a downstream end 3B. The airflow circuit 31 communicates, on the one hand, with the forced air unit 2 (with its air discharge outlet), and on the other hand, with the reservoir 30 via through ports 300.

[0036] The forced air unit 2 comprises a casing 20 housing a remotely controlled air intake and blower system 5, which includes at least one air inlet 21 upstream of the unit and connected to the upstream section 50 of the air intake and blower system, and one air outlet 22 downstream of the unit and connected to the downstream section 51 of the air intake and blower system 5. The air inlet 21 communicates directly with the outside of the device 1, with the ambient air. The air inlet 21 is preferably coupled with an air filter 23. The air intake and blower system 5 may optionally include a non-return valve 52. The forced air system 2 is powered by a 12V battery.

[0037] In the illustrated example, the casing 20 of block 2 has a frustoconical upstream end 2A comprising a free end 20' that is narrower than the rest of the block body in order to attach a long, slender gripping support such as a pole (not shown). The free end 20' is closed relative to the air inlet 21. The frustoconical end 2A is fitted with the air filter 23. The casing 20 of block 2 has a hollow cylindrical downstream end 2B adapted to fit the upstream end 3A of chamber 3.

[0038] Preferably, as mentioned above, the parts – forced air block 2, intermediate chamber 3, and projection chimney 4 – are all removable and detachable from each other. Also, in the example of the figure 7 The device comprises a pole 10 (removable and attached) which is hollow and has its two distal ends, upstream 10A and downstream 10B, open or perforated. The pole can be several meters long and made of several butted sections. The pole 10 is removably fixed between the forced air block 2 and the chamber 3. The upstream end 10A of the pole cooperates mechanically with the downstream end 2B of the forced air block 2. This open or perforated upstream end 10A communicates with the downstream air expulsion outlet 22 of the forced air block 2. The downstream end 10B of the pole cooperates mechanically with the upstream end 3A of the chamber 3. This open or perforated downstream end 10B of the pole communicates with the chamber 3, more specifically with the airflow circuit 31.

[0039] The air intake and blowing system 5 comprises a motor, a turbine, and electronic remote control and operating means. The air intake and blowing system 5 is a forced air system that delivers pressurized air at the air discharge outlet 22. Optionally, the air intake and blowing system 5 may include a non-return valve 24 at the air discharge outlet 22. The air discharge outlet 22 communicates with chamber 3, specifically with the airflow circuit 31.

[0040] The chimney 4 is fixed, for example, by screwing it around the downstream end 3B of chamber 3. The chimney 4 is preferably frustoconical, converging towards the opposite side of chamber 3, like a nozzle. The chimney 4 is hollow from end to end and communicates at its upstream end 4A with the reservoir 30, opening freely at the opposite end at its downstream end 4B. The free end 4B of the chimney 4 can be fitted with an accessory, for example, a rigid or flexible stinger, a type of device commonly used in the destruction of hornet nests.

[0041] With particular regard to figures 3 à 5 , chamber 3 is cylindrical in shape comprising two opposite ends upstream 3A and downstream 3B, an external cylindrical wall 32 and an internal cylindrical wall 33 at a distance from the external wall so as to provide inside the internal wall the reservoir 30, and between the external wall 32 and the internal wall 33, the air flow circuit 31.

[0042] The outer wall 32 forms the outer shell of the chamber 3. The outer wall 32 forms a hollow tube open at its two upstream and downstream ends. The outer wall 32 includes, around its downstream end, a removable fastening system 32' such as a thread for screwing into the chimney 4, which includes an associated tapped hole.

[0043] At the downstream end 3B of chamber 3, the annular space separating the inner wall 33 from the outer wall 32 is completely closed, as can be seen on the figure 4 The sealing of this annular space at the downstream end is, for example, achieved by a peripheral shoulder 33' of the inner wall 33. Thus, the downstream end 3B of the chamber 3 is open to correspond only to the interior of the reservoir 30. The airflow circuit 31 peripheral to the reservoir 30 cannot open outside the downstream end 3B of the chamber 3.

[0044] The internal wall 33 delimits the internal structure of the tank 5 and has a closed upstream end 33A, which corresponds to the closed bottom 30' of the tank ( figure 4 ), and a downstream end 33B which is open and corresponds to the inlet of the tank 30 ( figure 3 ). The inlet of tank 30 cooperates directly with the chimney 4. The inlet of tank 30 corresponds to the total cross-section of the interior of the tank.

[0045] In relation to the figure 3 , the air flow circuit 31 comprises at least one channel, preferably several channels 310 extending along the length of the chamber 3. The channels 310 are drawn between the outer wall 32 and the inner wall 33 by longitudinal blind cavities in the thickness of the wall 33 and by openings or recesses 33" spaced in the thickness of the edge of the wall at the upstream end 3A.

[0046] In the preferred example shown, each longitudinal channel 310 traces an inverted U-shaped airflow path in the inner wall 33, the curve of the U being close to the downstream end 33B (the curve of the U being closed by the shoulder 33'), and the U exhibiting: a first wing 310A which starts from the upstream end of chamber 3, from an opening 33" in the downstream edge of wall 33 and which is intended to be in communication with the air expulsion outlet 22, this first wing has a closed bottom wall, that is to say that the wall 33 of the tank 30 is solid and without through passages with said tank, and this first wing extending in the longitudinal direction of the cylindrical wall 33; a second wing 310B parallel to the first wing 310A, this second wing 310B which has its bottom wall corresponding to the wall 33 of the tank, including the through passages 300 and extending along the tank ending at the upstream end 3A at the level of the solid edge of the wall 33.

[0047] The through passages 300 are preferably slots staggered along the length or height of the tank 30 and perpendicular to the longitudinal direction of the tank. By way of non-limiting dimensional examples, particularly for use in an insecticide tank: The reservoir 30 has a height of approximately 100 mm and a diameter of approximately 30 mm to hold up to 40 g of powdered material; the slots 300 have a width (height direction) of 2 mm and 4 mm; the length of the slots (direction perpendicular to the longitudinal direction of the reservoir) corresponds to the width of the second wing 310B of the airflow channel, for example approximately 15 mm; the slots are staggered in 4 rows, spaced for example approximately 10 mm apart; the slots are distributed in four equidistant longitudinal channels around the reservoir.

[0048] It goes without saying that all the elements of the spraying device, and in particular the tank in terms of its size, will be dimensionally adapted according to the use.

[0049] Preferably, the tank has a lower end slot 301 in the immediate vicinity of the bottom that is wider than the other slots 300.

[0050] The operation of device 1 is as follows. Material to be propelled has been introduced into the reservoir 30. Device 1 is held by one hand of the operator or is positioned at the top of a pole held by the user's hand. The forced-air system 2 is activated by a button on a remote control, which is, for example, held in the user's other hand. The forced-air system 2 draws in ambient air through the inlet 21 and propels the air through the discharge outlet 22.The air propelled by the forced air system 2, which is already partially compressed, first travels along the first closed-walled wing 310A, whose narrower section than the expulsion outlet 22 further increases the speed of the air and compresses it. Then, upon arriving in the second wing 310B, it passes in turn through each stepped slot 300 from downstream to upstream, propelling the material out of the tank towards the chimney 4, and this progressively from the top (downstream part) of the tank to the bottom, ending with the lowest slot 301 of the tank to bring the material up to the downstream end or outlet of the tank.

[0051] Furthermore, the tank 30 can be loaded by dismantling the chimney 4 and pouring the material into the tank 30 of chamber 3. In one embodiment, particularly to avoid any contact with the material, the invention proposes a semi-automatic loading device 6 illustrated in figure 6The chimney 4 does not need to be dismantled. It advantageously includes at its downstream end 4B a coupling system with the loading device 6, preferably a magnetic system.

[0052] The loading device 6 comprises a storage tank 60, a control box 61, and a delivery outlet 62 positioned downwards in the loading position. The material stored in the tank is intended to fall by gravity through the delivery outlet 62, and preferably by vibration (the loading device includes a vibrator). The loading device 6 includes a pivoting valve 63 for opening and closing the delivery outlet 62, which is controlled by the control box. The spraying device 1 is removably attached to the delivery outlet 62. The free end 4B of the outlet of the chimney 4 is directly connected to the delivery outlet 62 of the loading device. Attachment is achieved, for example, by magnetism.Preferably, the loading device 6 also includes a receptacle 64 capable of collecting material when the valve 63 is closed / reopened and when the spraying device 1 is removed, in order to prevent any loss of product into the external environment. The receptacle 64 will subsequently be emptied appropriately to prevent any environmental pollution. The loading device 6, at least for use with insecticides, is mobile; it is portable and can be transported in a vehicle. On site, the operator loads the spraying device 1 from the loading device 6, which is in their vehicle, with the dose of material delivered being just that required for the application (the tank 30 of the spraying device does not necessarily need to be completely filled); the operator does not have to handle the insecticide at all.Then the operator moves on foot to the area to be treated, carrying the spraying device 1 filled with the appropriate dose and attaches it, if necessary, by its end 20' to a pole and optionally attaches it to the free end 4B of the chimney 4. To propel the material, the operator starts the pulsed air system 5 of the spraying device via the remote control and can stop it at any time by pressing the remote control again.

Claims

1. A device (1) for spraying or projecting powdered, flaked, fragmentary, or even liquid material, which may be airborne, the device comprising from upstream to downstream: - compressed air supply means, - a reservoir (30) for receiving the material to be sprayed, - a downstream projection stack (4) communicating with the reservoir (30), - the reservoir (30) being housed in a chamber arranged between the compressed air supply means and the stack (4), and - the compressed air supply means comprising a pulsed air unit (2) and a compressed air flow circuit (31), the circuit (31) communicating with the pulsed air unit (2) and being arranged and enclosed within the chamber (3) while being outside the reservoir (30) and extending along the length of the reservoir and all around it.while the reservoir (30) includes through passages (300) which open into the air flow circuit (31).

2. Device according to claim 1, characterized in that the reservoir (30) includes a closed bottom (30'), an internal wall (33) which is at a distance from the external wall (32) of the chamber and a downstream end (33B) communicating with the chimney (4), and the air flow circuit (31) includes a plurality of longitudinal air flow channels formed in the thickness of the internal wall (33) and according to the length of the reservoir, the longitudinal channels including a part (310A) communicating with an air expulsion outlet (22) of the forced air block and a part (310B) including the through passages (300, 301), the two parts of the channel being partitioned except at one end which is opposite the air expulsion outlet (22).

3. Device according to claim 1 or 2, characterized in thatthe through passages (300, 301) are spaced slots which are arranged around the perimeter of the tank and which are staggered according to the length of the tank.

4. Device according to claims 2 or 3, characterized in that Each airflow channel forms an inverted U-shaped longitudinal channel, with - a first wing (310A) which starts from the upstream end of the chamber in communication with the air expulsion outlet, which is closed to the wall of the tank and which extends along the length of the tank to the end of the curvature of the U, - a second wing (310B) which is in continuity with the curvature of the U and is parallel to the first wing, which includes the through passages and which extends along the tank ending at the upstream end of the chamber in a closed manner.

5. Device according to any one of claims 2 and 3, characterized in thatthe slots (301) which are arranged near the bottom of the tank, at least for the slots of the stage closest to the bottom, have a larger cross-section than the cross-section of the other slots (300).

6. Device according to any one of the preceding claims, characterized in that the forced air unit (2) includes an air suction and blowing system (5) which includes a motor, a turbine and electronic means for remote piloting and control.

7. Device according to any one of the preceding claims, characterized in that the forced air unit (2) includes at least one air inlet (21) which is coupled to an air filter (23).

8. Device according to any one of the preceding claims, characterized in that the chimney (4) is convergent downstream, like a nozzle.

9. Device according to any one of the preceding claims, characterized in thatthe chimney (4) has a downstream end (4B) which includes removable fixing means, in particular by screwing or by magnetizing, for fixing an accessory chosen from accessories which are dependent on the use of the device, such as rigid or flexible prods for treating hornet or wasp nests or for fixing the spraying device to a loading device (6) of the material intended to be loaded into the tank.

10. Device according to any one of the preceding claims, characterized in that It includes a removable pole which is attached to a free termination (20') of the forced air block (2), opposite the air expulsion outlet (22).

11. Device according to any one of claims 1 to 9, characterized in thatIt includes a removable pole (10) which is hollow and has two open or pierced distal ends upstream (10A) and downstream (10B), the pole being fixed in a removable manner between the pulsed air block (2) and the chamber (3), the two open or pierced distal ends upstream (10A) and downstream (10B) communicating respectively with the pulsed air block (2) and the chamber (3).

12. Device according to any one of the preceding claims, characterized in that the chamber (3) and the chimney (4) are removable, and preferably the reservoir (30) is removable relative to the chamber (3).

13. Assembly comprising a spraying device (1) according to any one of the preceding claims, and a material loading device (6), the loading device (6) comprising a storage tank (60) and semi-automated means (61) for delivering the material in a controlled quantity.

14. Together according to the preceding claim, characterized in that the loading device (6) includes a delivery outlet (62) which is able to cooperate by removable attachment with the so-called downstream free end (4B) of the chimney, preferably by magnetization, and which is able to deliver the material by gravity and in particular by a vibratory effect, the delivery outlet including an automated opening and closing valve.

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